Bending machine



{Sept 16, 1952 HA. THOMPSON BENDING MACHINE Filed June 27, 1950INVENTOR. HAROLD A. THOMPSON ///\&///

A T TORNEY Patented Sept. 16, 1952 ,U NlTED- coir-rice I 6 l V 112510,666 11 T: '7 emme MACHINE Hinge-Thompson, S b r n o e- ApplicationJune 27, lssmjserisrud. 127114303 1"; I 2 Claims. (ctiefifsi-fThisinventionrelates t6 bending machines and I is particularly adaptedfor bendlng ofiiat metal bars and the'like.

Theprimary object of the invention is 1 .0 Plfovide; a bar; bendingmachinemfor bending; fiat metal bars; of any thickness? by-interchangingsimple removable bending anvils within; the bending machine without theuse of tools.

With my new and improved bending machine, various thicknesses of fiatbars can be bent at a sharp angle, or they may be bent with more or lessof a radius bend by simply changing the removable bending anvils.

The thicker the bar to be bent the less number of bending anvils thatwill be required to bend the same, or by adding or removing some of theanvils with a given thickness of bar a bend of varying radii may bemade.

A further object of my invention is to provide a simple bending toolthat can be mounted on a bench having few parts, requiring no tools foradapting the same to the various thickness of fiat bars to be bent.

These and other incidental objects will be apparent in the drawings,specification and claims.

Referring to the drawings:

Figure 1 is a perspective view of my new and improved bending machine inpartial exploded view.

Figure 2 is a plan sectional view of Figure 1, taken on line 2-2.

Figure 3 is a plan view of Figure 1.

Figure 4 is a side sectional view, taken on line 4-4 of Figure 3.

Figure 5 is a side sectional view, taken through Figure 3 on line 5-5and on line 5-5 of Figure 2.

Figure 6 is a perspective view of the bending anvil removed from thebending machine, the handle partially broken away.

Referring more specifically to the drawings:

The bending machine comprises a base I, having a working surface with abearing opening 8 recessed therein, and two spaced-apart stationaryvertically disposed angular shaped anvils 2 931d ,3 welded in place asat 4. I

5 indicates a rotary bending member. This member consists of a disk 6and a semi-disk I and an intermediate bending anvil. The disk 6 isjournaled in the bearing opening 8, while the bending anvil is incooperative relation with the fixed anvils 2 and 3. The bending anvil isdisposed with its apex in alignment with the axis of said disk 6, andsaid semi-disk 1 has a flat edge l6 that is coplanar with one surface ofsaid anvil as best shown in Figure 6.

1 semidiskilisiournalledgwithinlitbeariiig 9 termed by a segmentalfportion. i 0 ,Qweldcdf at";

to the, top or. the, fixed anvi portion 1 Z" spacedlfrom. the

i 7 portion HI? andjwhich', is integral with the, fixed? anvil; 31andian arcua'te' portion M on a. removable "ringg lt @The removable ringll3i surrounds thejj sega mental portions. If!) andj'rt; Willh,itsarcuate tron-H filling the gap between'said two portions [0 and I2. 7

The purpose of this structure is to provide a space when the ring 13 isremoved to place a flat bar to be bent between the anvils 2 and 3, orremove said bar after bending. By removing the ring l3 and aligning thefiat edge l5 of the semidisk I, the bar to be bent will pass downthrough the space ll between the segments l0 and I2 of tthe bearing 9and past the flat edge I6 01 the semi-disk I, and past the side of thebending anvil 5 to the bases. When the ring I3 is replaced, it completesthe raceway for receiving the semi-disk I and confines the bar betweenthe two anvils 2 and 3.

It will be noted that the semi-disk I engages the segment l0 and pushesagainst the same in the bending operation, as shown in Figure 3.

The bearing surface of arcuate portion I4 is co-radial with the innerbearing surfaces of the bearing ring segments l0 and [2.

In the operation of my new and improved bending machine, the ring it isremoved as illustrated in Figure 1. This permits the insertion of thebar 18 to be bent. Removable anvils IS jareQ- placed between the anvil 3and the bar, the mamber or size of anvils placed therebetween will moreor less determine the radius that the bar is to be bent.

The handle 20, which is fixedly secured to the bending element 5, isthen moved in the direction of the arrow 2|, which will bend the bar l8at 22 against the anvils IS. The amount that the bar will be bent can bedetermined by the scale markings 23. After said bar is bent, the ring 13is removed as shown in Figure 1, permitting the bar to be removed fromthe bender.

One of the outstanding features of my bending machine, is the rigidityof structure as well as its simplicity, having the bending elementmounted between two rigid bearings, one in the base plate and the upperbearing, which is mounted rigidly to the upper ends of the anvils.Further, this upper bearing can be dismantled, permitting the insertionand removal of the object to be bent, and the'provision of auxiliarybending anvils for forming the desired bends on the object to be bent.

These anvils are always handy, as they are supported by the verticallymounted angle 24, which is welded to the base I and the upstanding pin25, which receives and holds the auxiliary anvils I! in place for easyaccess in the bending operation.

Although certain specific modifications of the invention have been shownand described, it is obvious that many modifications thereof arepossible. The invention, therefore, is not to be restricted except in sofar as is necessitated by the prior art and by the spirit of theappended claims.

What I claim is:

1. A bending apparatus comprising a base having a horizontally disposedworking surface with a bearing recessed therein, a pair of spacedangular anvils fixed to said base and extending upwardly from saidworking surface adjacent said bearing, a bending member including a discjournalled in said bearing and carrying a vertically disposed angularbending anvil in cooperative relation with said pair of anvils forbending a metal strip, and a handle extending from said bending memberfor pivoting said disc to swing said bending anvil relative to said pairof anvils, a semi-discfixed to the top of said bending anvil, saidsemi-disc having a diametrical edge that is faces of said segmentsforming bearing surfaces for said semi-disc, the bearing portion of saidring extending between said segments and having a bearing surfaceco-radial with said segment bearing surfaces.

HAROLD A. THOMPSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 757,078 Wood Apr. 12, 19041,033,309 Fisher July 23, 1912 1,628,581 Dinkel May 10, 1927

